C. Fleutelot et al., PROPAGATING SPREADING IN BACK-ARC ENVIRON MENT - FIRST RESULTS OF THEPROFETI CRUISE (NORTH FIJI BASIN, SW PACIFIC), Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 322(10), 1996, pp. 853-860
Sampling was conducted as part of the ProFeTi cruise of RV Ails in the
middle of the North Fiji Basin along the NS spreading segment, which
has been propagating northward inside the N15 segment for at least 1 M
a. Despite its back-are geodynamic position, no geochemical signature
of a subduction zone is noticeable. The studied sample set shows that
the magma reservoir of this propagating segment evolves towards a ther
mal and geochemical equilibrium, which is disturbed by the following p
rocesses: 1) the influence of the remoteness of the propagator tip fro
m the magmatic feed zones focused under the segment centre, 2) the per
iodic input of early magmas evolving as the propagator matures, and 3)
the cold-edge effect of the N15 crust into which the NS segment propa
gates.